#include <stdio.h>
int f (int a);
int main()
{ int s[8] = {1,2,3,4,5,6},i,d=0;
for (i=0;f(s[i]) ;i++)
 d+=s[i];
 printf("%d\n",d);
 return 0;
}
int f(int a)
{ return a%2; 
}